Safety bkake device for vehicles



.I. 0. HART.

SAFETY BRAKE DEVICE FOR VEHICLES.

APPLICATION FILED JULY 23,1920.

1,433,132. Patented Oct. 24,1922.

Patented Oct. 24, 1922.

v UNITED VPI-VAVTEVNT" OFFICE.

.rorriv o. HART, or CINCINNATI, onto.

SAFETY BRAKE DEVICE FOR VEHICLES.

Application filed July 23,

To all whomc't may concern: 2 Be it known that 1, JOHN O. HART, a citizen of the United States of America, and resident of Cincinnati, in the county of Hamilton and State of Ohio, have invented a new and useful Improvement in Safety Brake Devices for Vehicles, of which the following is a specification.

'An object of myinvention is to provide a brake for the front-steering wheels of a vehicle that will cooperate with thebrakes operating upon therearwheels mounted on an axle that is fixed upon such vehicle, thereby providing an additional and an efiicient safety appliance. a

Another object is to provide a brake that is especially adaptable to the front wheels of automobiles,

These and'other objects are attained by the means described herein and disclosed in the accompanying drawingsin which:

Fig. 1 is a front elevation of part of an automobile to which a device embodying my invention has been applied.

Fig. 2 is a sectional View on line 2 2 of Fig. 1, parts being broken away.

. F 'g. 3 is an enlarged sectional view on line 3-3 of Fig. 2.

Fig. 4 is a sectional view on lined- 4 of Fig. 5 is a. plan View of a section of a device embodying my invention. v

. Fig. 6 isa sectional View on line 6-6 of Fio' 3 I y invention comprises a, cam shaftA A that is rotatablyactuated by the manipulation of the'foot lever F thereby engaging the brake shoe B upon the drum upon the front wheels of a vehicle, simultaneously with the operation of the brake upon the transmission shaft. Although I have shown mydevice' as applied to an automobile in l which the foot brake operates upon the transmission shaft, it may be applied to any other type of automobile by attachln I both rear and front wheel brake mechanlsms to the same foot lever.

Thecam shaft l -A a mounted adja cent and parallel to the axle A and connect ing rod A and is supported by thebrake shoe B in the drum D. The cam shaft is out 1920. Serial No. 398,397.

at its center and the two adj acentends thereof are reciprocatingly contained within the sleeve 0; and are held apart by the spring 0.

contained w-ithinthe sleeve. The cam shaft and sleeve are preferably square in cross sec tion so that shaft A-A and thesleeve will telesco pic cam shaft, or a telescopic joint.

'The collars a and a are mounted upon the sleeve 6; equidistant from the center of the cam shaft and are secured'thereto by means of the set screws a and a and have the downwardly projecting lugs a and a respectively to which the ends of the cable G are attached. Sections A and A of the "cam shaft are constructed similarly. The flange a and cam a are formed on the outer ends of the cam shaft AA. v

The cable C at its middleextends around the pulley f mounted on the arm f formed on the foot lever F that operates thefbrake upon the transmission shaft I {not shown) containedwithin the housing The. cable C and lugs a and a? need not be in the'same positions as shown, but must be in such aposition that the operation of the foot lever F will cause the cable-to rotatably move the cam shaft. The pulley f acts as anequalizer in that it permits the movement of the front wheels to steer the vehicle,-yet the brake will be immediately subject to any movement of The flanges b? and b formedon the unattached ends of the segments 12 and 6 respectively have the adjustment plates 6 and 12 mounted thereon. The plates 11 and Z2 are secured in position by the pins Z2 projecting from the flanges b and b and engaging in slots 6 in the adjustment plates. Adjustment screws 6 having lock nuts 79 mounted thereon, extend through the flanges and enga e the adjustment plates,

whereby the bra (e shoe segments may be adjusted to assume positions-1 closer to or.

farther from the drum, whereby the shoes may be brought into engagement with the drum at various degrees of movement of the foot lever, and also varyingthe' tension of the pring 1). Gain a extends between plates 6 and 6 The drum D is of the usual constructimi employed in drums that are mounted upon the rear wheels of automobiles, and isattached to the front Wheel similarly to the attachment of such drums to rear wheels. The

drum engages the plate 6 and serves as a thereby causing the cable to pull the lugs a and (1 upon sleeve 0, such movement of the lugs and sleeve actuating the cam shaft rotatably. The cams a on the cam shaft turn between the adjustment plates on the brake shoe segmentsftherebyspreading the brake shoe and causing the'sh'oe to engage the drum. 5

VVhenthe machine is moving in other than a straight line, the pulley 7 permits the cable to adjust itself to the movement of the cam shaft so that the brakes on the front wheels will act regardless of the position of the wheels, The spring 6 returns'the parts to their normal positions The flange 0: on the cam shaft is contained between the collar 6 and plate Z2 thereby avoiding dislocation of the parts. The spring a serves to hold apart thecam shaft parts A and A;

hat I claim is:

1. The combination with a lever controlling a brake adapted to operate upon the transmission shaft of'an automobile, of a brake adapted to operate upon the steering wheels of the automobile and comprising a lever arm on the lever, a camshaft the opposite ends of which are operative upon the brakes on the steering wheels, and a cable connecting the lever arm and the cam shaft.

2. The combination with a lever controlling a brake adapted to operate upon. the transmission shaft of an automobile, of a brake operative upon the steering wheels of the shoes into engagement with the drums,

and a cable connecting the lever arm and the cam shaft.

3. The comblnatlon with a lever controllinga brake adapted to operate upon the transmission shaft of an automobile, of a brake 1 operative upon the steering wheels of an automobile and comprising a lever arm mounted on the lever, a pulley on the lever arm, a cam shaft, and a cable secured to the cam shaft and engaging the pulley.

' 4:. The combination with a lever controlling a brake adapted to'operate upon the transmission shaft of an automobile, of a brake adapted to operate upon the steering wheelsof an automobile and comprising a lever arm on'the lever, brakes on the steer ing wheels, a telescopic cam shaft engaging the brakes-on the steering wheels, and a connecting' means'inounted on the lever arm and the cam shaft,

5; In a brake for wheels having spindles the'combina'tion with brakes operative upon the wheels, of a telescopic cam shaft operative upon the brakes, and a levercontrolliug' the telescopic cam shaft.

6. In a. brake for a pair of wheels having movable but non-revoluble spindles, the combination with vdrumsn'iounted on the wheels, of brake shoes mounted upon the spindle and adapted to engage the drums, a cam shaft engaging the brake shoes on both spindles, and means to actuate-the cam shaft.

7. In a brake for wheels having spindles, the combination with drums mounted on the wheels, of brake shoes mounted upon the spindles, atelescopic cam shaft engaging the brake shoes and adapted to move the shoes into engagement with the drums, and a lever adapted to revolubly actuate the cam shaft.

8. In a brake for wheels having spindles, the combination'with drums mounted on the wheels, of brake shoes operative upon the drums, a telescopic cam shaft operative upon the brake shoes, lugs extending. fromthe cam shaft, a lever, a pulleymountecl on the lever and a cable attached at its ends to the lugs and engaging the pulley.

' 9. In a brake for wheels having spindles, the combination with drums mounted on the Wheels, plates mounted on the spindles, brake shoes pivotally mounted on the plates and operative upon the drums, atelescopic cam shaft extending through the plates and operative upon the brake shoes, flanges on the cam shaft, collars mounted on plates and each securing a flange between itself and one of the plates, lugs on the cam shaft, a lever, a. pulley on the lever and a cable attached at its ends to the lugs and engaging thepulley. l

10., In a brake for wheels having spindles, erative on the Wheels a revoluble telescopic thecombination with brakes operative upon cam shaft operative on the brakes, and the Wheels, of a revoluble telescopic carr means to revolubly actuate the cam shaft. 10 shaftoperative upon the brakes, and means In witness whereof, I have hereunto sub- 5 to rotatably actuate the cam shaft. scribed my name this 20th day of July, 1920.

11. In a device of the class described the combination of a pair of Wheels, brakesop- JOHN O. HART. 

